Chaos: the scene outside East Croydon station last night as thousands descended on the area (Picture: @vickystew/Twitter)

A 15-year-old boy has died after falling ill at an illegal rave in Croydon in which seven other people were also sent to hospital.

Scotland Yard said the cause of death has still to be confirmed and a post-mortem examination is being arranged.

The incident happened at a disused sorting office in Cherry Orchard Road, Croydon, in the early hours of June 15. The boy was taken from the venue by ambulance to hospital, where he died today.

Huge crowds: people gathered outside the venue (Picture: Twitter)

A 19-year-old man, who also become ill at the same event, is still in hospital in a stable condition.

Scotland Yard said it is aware of six other people who were taken to hospital with injuries. All six have been discharged from hospital.

Police clashed with party-goers at the event which was, according to reports, attended by several thousand.

Police operation: officers were called to the event but decided to let it continue to avoid further danger (Picture: @jackfitz/Twitter)

Officers eventually entered the building at 08:30 on Sunday morning.

In total 14 people were arrested in connection with the event for a range of offences including drugs offences, violent disorder and money laundering.

Two men have been charged with violent disorder and drugs offences and a 47-year-old man along with a 30-year-old man were given adult cautions for possession of class A drugs.

Another three men were arrested on suspicion of money laundering, a 17-year-old boy was arrested on suspicion of violent disorder and a 22-year-old man was arrested on suspicion of criminal damage. All five have been bailed pending further inquiries.

Scotland Yard said another five men are still in custody after being arrested today for handling stolen goods and criminal damage offences in connection with the investigation.

Croydon Central MP Gavin Barwell, who strongly criticised those involved in organising the event, said: "My thoughts are with this boy's family at their tragic and unnecessary loss.